Carbon fiber is widely used in the field of composite materials, mainly in the following aspects:

1. Aerospace field: Carbon fiber composite materials are one of the important applications in the aerospace field. Because carbon fiber composite materials have the characteristics of high strength, high rigidity and low density, they can be used to manufacture aircraft fuselages, wings, vertical tails, etc., and can effectively reduce the weight of aircraft and improve fuel efficiency and range.

2. Automotive industry: Carbon fiber composite materials are increasingly used in the automotive industry. It can reduce the weight of the car and improve the vehicle's handling, acceleration performance and fuel efficiency. Common applications include car bodies, frames, brake systems, exhaust systems, etc.

3. Chemical industry and energy field: Carbon fiber composite materials also have important applications in the chemical industry and energy field. For example, carbon fiber composite materials can be used to manufacture chemical equipment, oil pipelines, gas storage tanks, etc. In addition, carbon fiber composite materials can also be used in energy storage and conversion devices such as battery electrodes and hydrogen fuel cells.

4. Sports equipment: Carbon fiber composite materials are important materials for many sports equipment such as golf clubs, tennis rackets, bicycle frames, etc. Carbon fiber composite materials are lightweight, highly rigid and have good vibration damping properties, providing better performance and control.

5. Construction field: Carbon fiber composite materials can be used in structural reinforcement, decoration and energy saving in the construction field. For example, carbon fiber cloth can be used to reinforce concrete structures, carbon fiber panels can be used for wall decoration, and carbon fiber window frames can be used to save energy, etc.